King blasts FBI

4/21/13 9:55 AM EDT

Rep. Peter King blasted the FBI on Sunday for failing to prevent the Tsarnaev brothers from carrying out the Boston Marathon bombings when the agency had already been told about the older brother's extremist potential.

"This is at least the fifth case I'm aware of where the FBI has failed to stop someone," the chairman of the House Subcommittee on Counterterrorism and Intelligence said on "Fox News Sunday."

King, a Republican from New York, ticked off cases such as Anwar al-Awlaki, who planned terrorist attacks as part of al Qaeda; Carlos Bledsoe, who opened fire in in front of a military recruiting office in Little Rock, Ark., in 2009; and Nidal Malik Hasan, who opened fire at Fort Hood, Texas, in 2009.

"This is the latest in a series of cases like this...where the FBI is given information about someone as being a potential terrorist," King said. "They look at them, and then they don’t take action, and then they go out and commit murders."

The FBI questioned Tamerlan Tsarnaev about two years ago on the request of the Russian government, but concluded he was not a threat.

King said Tsarnaev should have been flagged and monitored at the least.

"He has statements up on his web site, he’s talking about radical imams," he said.

King said law enforcement needs to focus more intently on the Muslim community, where the terror threat is emanating from, even though 99 percent of Muslims are law-abiding, good people.

"If you know a threat is coming from a certain community, you have to go after that," he said.